How use middleware for differentiate between normal user and admin - laravel-5.5

Question

I have created a middleware the purpose of this middleware is that to differentiate between admin and normal user but it is not working properly whatever user or admin come it redirect to the same page and my condition is not working and I am using the same table for normal user and admin. I am using laravel 5.5 for this.
if (Auth::user() && Auth::user()->isAdmin == 1) {
return $next($request);
}
return redirect()->action('HomeController#index');

Answer 1

okay follow my guide
run this comment in your terminal "make sure cd to ur project"
php artisan make:middleware IsAdmin
Edit isAdmin file
public function handle($request, Closure $next)
{
if (Auth::user() && Auth::user()->admin == 1) {
return $next($request);
}
return redirect('/');
}
Add it to the routeMiddleware array in your kernel file by opening app/Http/Kernel.php
'admin' => \App\Http\Middleware\IsAdmin::class,
Apply the middleware to your route
Route::get('admin_area', ['middleware' => 'admin', function () {
//
}]);
Hop this is work for you

Answer 2

Open Middleware -> RedirectIfAuthenticated.php
1.Remove this code:
public function handle($request, Closure $next, $guard = null) {
if (Auth::guard($guard)->check()) {
return redirect('/home');
}
2.copy/paste this one
public function handle($request, Closure $next, $guard = null) {
if (Auth::guard($guard)->check()) {
return redirect('/home');
}else{
return redirect()->action('AdminController#login')->with('flash_message_error','Please login to access');
}
return $next($request);
}
}